Merged branch 'dev_native' into lm_sla_supports_auto

Added igl library files

src/igl/opengl2/draw_point.cpp

@@ -0,0 +1,100 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public License 
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+// obtain one at http://mozilla.org/MPL/2.0/.
+#include "draw_point.h"
+
+// Implementation
+#include "gl.h"
+
+#include <cassert>
+#include <cmath>
+
+IGL_INLINE void igl::opengl2::draw_point(
+  const double x,
+  const double y,
+  const double z,
+  const double requested_r,
+  const bool selected)
+{
+  // Push GL settings
+  glPushAttrib(GL_ENABLE_BIT | GL_LIGHTING_BIT);
+
+  float f;
+  glGetFloatv(GL_POINT_SIZE_MAX,&f);
+  // THIS IS OVERZEALOUS on Mac OS X: OpenGL reports a smaller point size than
+  // possible.
+  //assert(requested_r<=0.5*f);
+  double r = (requested_r<0.5*f?requested_r:0.5*f);
+
+  //glDisable(GL_DEPTH_TEST);
+  glDisable(GL_LIGHTING);
+
+  // get current color
+  float color[4];
+  glGetFloatv(GL_CURRENT_COLOR,color);
+
+  double outline_size = (r>7 ? sqrt(r/7.0) : 1.0);
+
+  // White outline
+  glColor4f(1,1,1,color[3]);
+  glPointSize(2*r);
+  glBegin(GL_POINTS);
+  glVertex3d(x,y,z);
+  glEnd();
+  // Black outline
+  glColor4f(0,0,0,color[3]);
+  glPointSize(2*r-2*outline_size);
+  glBegin(GL_POINTS);
+  glVertex3d(x,y,z);
+  glEnd();
+  
+  // Foreground
+  glColor4fv(color);
+  glPointSize(2*r-4*outline_size);
+  glBegin(GL_POINTS);
+  glVertex3d(x,y,z);
+  glEnd();
+  // Selection inner circle
+  if(selected)
+  {
+    glColor4f(0,0,0,color[3]);
+    double selected_size = 2*r-7*outline_size;
+    selected_size = (selected_size>3?selected_size:3);
+    glPointSize(selected_size);
+    glBegin(GL_POINTS);
+    glVertex3d(x,y,z);
+    glEnd();
+  }
+
+  // reset color
+  glColor4fv(color);
+
+  // Pop GL settings
+  glPopAttrib();
+}
+
+template <typename DerivedP>
+IGL_INLINE void igl::opengl2::draw_point(
+  const Eigen::PlainObjectBase<DerivedP> & P,
+  const double requested_r,
+  const bool selected)
+{
+  switch(P.size())
+  {
+    case 2:
+      return draw_point(P(0),P(1),0,requested_r,selected);
+    default:
+      return draw_point(P(0),P(1),P(2),requested_r,selected);
+  }
+}
+
+#ifdef IGL_STATIC_LIBRARY
+// Explicit template instantiation
+template void igl::opengl2::draw_point<Eigen::Matrix<double, 3, 1, 0, 3, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, 3, 1, 0, 3, 1> > const&, double, bool);
+template void igl::opengl2::draw_point<Eigen::Matrix<double, 2, 1, 0, 2, 1> >(Eigen::PlainObjectBase<Eigen::Matrix<double, 2, 1, 0, 2, 1> > const&, double, bool); 
+#endif
+